Pyroxyline composition and process



Patented Sept. 16, 1924.

umrso STATES;

PATENT, OFFICE.

JOHN HENRY STEVENS, O15v SOUTH ORANO'E, NEW JERSEY, ASSIGNOR TO THE CELLULQIDCOMPANY, A GORPOBA'IIONOF NEW JERSEY.

I'YROXYLINE COMPOSITION AND PROCESS.

Ho Drawing.

To -all whom it may concern;

Be it known'that I, J OHN H. STEVENS, a citizen of the United States, residing at South Orange, in the .county of Essex and State of-New Jersey, have invented certain new'and useful Improvements in Pyroxyline' other words suflEicient camphor is intermixed withthe larger proportion. of chloral to impart to the chloral suflicient solvent power and immiscibility with water.

In carrying out the invention I preferably employ the methods commonly employed for pyroxyline plastics adaptable to the manufacture of sheets for fabrication into combs,

brushes, mirrors, trays, and other articles,-

and also combine with the chloral-camphor solvent the solvents, hereinafter mentioned.

Preferably I first grind the camphor with the hydrated pyroxyline, and then add the chloral to the dried cake or pulp at the time of introducing the usual liquid solvents or menstrua necessary or convenient for making a combination for easy manipulation, on rolls for example. Both of the solids may however be ground with the hydrated pyroxyline at the same time if desired and the water then removed. Suitable pigments or other coloring matters can be added in the customary manner, that is, either by grinding them with the pulp or introducing them by simple admixture or in solution at the rolls or mixers, as is well understood. Press- ,ing the rolled product into blocks, planing the blocks into sheets, and drying and finishing the sheets for the market or further use is done in the usual way. 7 p

By chloral Imean the hydrate or alcoholate or any equivalent thereof, but my preference is for chl )Ifll alcoholate, which I have discovered possesses qualities quite superior to those of chloral hydrate or other chlorals of commerce. The use of the aloof Application filed August 14 1923. Serial No. 657,430.

holate results in compounds which are more readily manipulated and appreciably stronger. Nevertheless, the hydrate, when used according .to my proportions, is'also capable of furnishing products of a surely.

fine character when compared with the uncertainand variable chloral compounds previously made.

As examples of compositions and proportions, I give the following:

For a hard material to be cut, bent, sawed or moderately flowed under heat, I use as the original mixture:

Pyroxyline 100 pts. by weight. Gamphor 5 pts.

Chloral alcoholate 1'5 to 20 pts. Amyl acetate 10 pts.

Alcohol 25 pts,

Pure acetone 35 pts. Color As desired.

The higher chlorahproportion makes a material which can be more readily manipulated but one that is still of peculiar use for hard purposes.

" For a compound which is to be moldable when dry, I employ:

Pyroxyline 100 pts. Camphorc, 10 pts. ,Chloral alcoholate 15 to 20 pts. Amyl acetate 10 pts. Alcohol 25 pts.

Pure acetone 35 pts.

Color As desired.

The higher chloral proportion makes for.

increased plasticity.

' For a tough or flexible sheeting, I use: I

Pyroxyline 3 pts. Camphorm; 10 pts. Chloral alcoholate 30 pts.

Amyl acetate "'10 pts. Alcohol1 25pts., Pure acetone 35 pts. Color As desired.

In place of amyl acetate Iv can use any of its trade equivalents; for exam le, butyl acetate'and propyl acetate as we as the mixed fusel oil acetates. In all cases the amyl, or its equivalent acetate, is to remain fairly constant, but the acetone and alcohol can be more or less, provided the relative proportion of 35:25 ismain'tained.

tics of camphor in respect to the workabil ity of the mixtures and the resultant product, especially in respect to the homogeneous, strong and non-brittle character of the product. v

l have found very desirable results produced by employing ethyl acetate as a converting agent in conjunction with the gchloral-camphor solvent. ll instead of employing the ordinary ethyl acetate of commerce, I employ pure, or so-called 99% ethyl acetate, the final compound will have no after odor of ethyl acetate. 1 therefore recommend asa formula superior to those already given the plentiful substitution of pure ethyl acetate for the amyl acetate in such formulas. l have had complete success with the following:

Pyroxylinen un; -100 parts. Camphor 5 parts. Chloral alcoholate. to pts. Pure ethyl acetatepts. Alcohol pts. Pure acetone 12 pts. Color As desired.

i This is fora hard,practically nonplastic, sheeting. 'llhe proportion of ethyl acetate may be varied to suit diflerent manulactur ing conditions. 7 However, it is found that, unlike amyl acetate, the proportion of the ethyl acetate which remains in the find dried product is fairly constant. plastic or moldable sheet ll use 5 parts more of the camphor and the larger proportion of chloral, namely, 20. For a still more plastic or toughersheet It add 5 arts of the amyl acetate. The acetone can e increased or diminished 'accordin to the consistency Y desired in the ori mixture, thatv is,

whether it is to be' softer or stiller.

By the use of the pure ethyl acetate ll produce a strong al sheet which is prac tically inodorous and of the best uality demanded by users of pyroxylinep astics. This is especially suitable for boxes or other articles which, while remaining closed, ac-

I cumulate odors emitted by the pyroxyline material of which the-we ll desired1i synthetic camphor may be em= are termed.

played in p ace ot the natuml substance.

-my chloral-camphor solvent.

. the co in my co-pendin For a incense pablaof giving the best workability, solidity and strength the employmentof this particular pyroxyline in association with As for the usual soluable pyro xylin'es which form the basis for plastics they can nevertheless be made available, but ll advise that those of materially higher nitrogen content be softened and manipulated very carefully and with a plentiful use of liquids, especially those of high dissolving power and lingering eiliciency, like ethyl acetate, for example.

I would also assist the solvent action by add- I ing amyl acetate to a moderate degree. As for the more liquid compounds, such as those used for cements, dopes and s, the camphor-chloral proportions are to be retained, but the stronger solvents are necessarily increased. The practice with camphor will be the operators guide, for the liquid menstrua employed with camphor in on way can also be used with my chloral-camphor solvents. In this cased there will be .no special restrictions on the pyroxyline with reference to its content of nrtro. en. Any pyroxyline usable with camp or will be compatible in these llowable solutions.

Certain matter herein disclosed is claimed application, Serial No. scares, filed Qctdber 1, rear.

ll claim: 1

l. A plastic composition containin a mixture of pyroxyline, a choral in preminant proportion, camphor in small propor tion and ethyl acetate.

2. A composition containing pyroxyline a chloral, sucient camphor to impart to t e chloral solvent wer and immiscibility with water and ethy acetate.

- .3. ll composition comprising substantially p pyroxyline, 5 parts camphor,

to 20 parts pr a chloral, and pure ethyljacetate.

l. A composition comprising substan- Mill) tially 100 parts pyroxyline, 5 parts camphor, 15 to 20 parts of a chloral and ap proximately 25 parts of ure ethyl acetate. 5. The process of mag a pyroxyline composition which cons in converting 100 parts pyronylrne by the aid of substantially 5 parts cphor, 15 to 241? arts of a chloral, 25 parts ethyl acetate, an a solvent. 7 6. The process of malning pyroxyline roxyline, substantia y g camphor and 15 plastics which consists in converting 100 parts of pyroxyline by the aid of pure ethyl acetatealong with from to arts of to 30 parts of a ch oral, as degcrlikbed.l

- 'p astic comfiosition containing py- 5 to 10 phor, to .30 parts of chloral alcoholate and me ethyl acetate. a

8. e process of making pyroxyline plastics which consist of converting 100 parts of pyroxyline by the aid of pure ethyl acetate along with substantially 5 to 10 parts of camphor and 15 ,to 30 parts of chloral alcoholate as described.

9-. A plastic composition. containing 100 parts of pyroxyline having a nitrogen content of 10.2 to 10.7 substantially 5 to 10 parts of camphor, 15 to 30 parts of a chloral and pure ethyl 'aceta 10. The process of making pyroxyline part'of camtent of plastics which consists in converting 100 parts of pyroxyline having anitrogen content havmg 10.2 to 10.7% by the aid of pure ethyl acetate along y to 10 parts of camphor and 15 to parts "of a chloral as described.

plastic composition containingv 100 parts of pyroxyline having'a nitrogen conplastics which consist in converting 100 85 parts of pyroxyline having a nitrogen content of 10.2 to 10.7% by the'aid of pure ethyl acetate along with substantially 5 to 10 of camphor and -15 .to 20 of chloral alcoholate, as described. 7 1

JOHN mNRY STEVENS.

with sustantially 5 26 10.2 to 10.7 %,v quantum sufiicit of 

